I have an angular UI communicating with a iris rest api. Now I need to authenticate (to federated) before accessing the UI, and for a better solution as the users are using the healthshare clinical viewer 2023, find a way to use the clinical viewer authentication / user to go to the UI.

The angular way would be to do an angular guard and have a function 'am I authenticate to federated', but I never found a function like this and how to get my username.